Hey guys I appreciate your talk on frame material, however after some research seems that granite is the winner, in most ultra precision cnc mills the frame or base is granite or granite epoxy, the cost of the 3 plates I propose come at around 1000 euros and for me that's resonable if I only need to bolt them together, sure the same build can be done in steel and cheaper maybe if you can access a big shop or have friends with that kind of machines but I live in a city centre so no machine shops here.. in the end my cutting forces from 1 mm end mills and 0.1mm depth of cut is nothing, so steel or granite will be overkill either way, drilling and glueing inserts with the right tooling will be fairly easy and is well documented.
Check out this insane build:
https://www.usinages.com/threads/pro....114107/page-7
Frame material is the least of my worries right now, ballscrew choice, calculations to know if a 100w servo is enough or what preload I should order rails are the kind of things that Im quite lost at the moment.